**Mechanical Engineering Written Exam Questions (GTCL-2010)**

**Company- Gas Transmission Company Limited (GTCL)**

**Post- Assistant Engineer-Mechanical**

**Year- 2010**

➦ Explain regeneration of gas turbine
with the help of schematic diagram.

➦ Write 3 types of gear. Which are the
typical uses of worm gear?

➦ Write down the comparison between 4-strokes & 2-strokes engine.

➦ Differentiate flow in pipe &
open channel flow.

➦ Draw the P-V & T-S diagram of
Joule-Brayton cycle.

➦ Define Positive Displacement pump.

➦ A eight cylinder I.C Engine has bore
X stroke = 75 m X 70 m. Compression ratio =10:1, calculate the volume of
combustion chamber & specified the engine.

➦ A pump has suction head =0.4 m,
delivery head =14.6 m, Discharge =10 m

^{3}/h. To drive the pump you have to select a motor which has efficiency 90%. Calculate the power of the motor. ➦ A vapor compression system has 10
ton capacity, COP=3, what the power required to KW?

➦ A cantilever beam has length 1 m,
15N load is applied in its top. If EI=10 Nm

^{2}, What is the maximum deflection? ➦ A thin cylinder has inner diameter =
50 mm, thickness = 2.5 mm, Maximum allowable normal stress = 150 MPa. What will
be the internal pressure?

➦ Define Reynolds Number.

➦ Define Mach Number.

➦ Define Nusselts Number.

➦ Define Prandlts Number.

➦ Write the Euler's equation for both
end clamped. A Euler column of both ends clamped which unsupported length= 1.0
m, stiffness EI=50 Nm

^{2}. What is the bulking load? ➦ A spring stiffness 50 KN/m, mass = 3
Kg is hang on spring. Write down the equation of the state, what's the frequency
of vibration.

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